FR2254915A1 - Combined radio transmitter-receiver - has contactless switch connecting dual purpose antenna - Google Patents

Combined radio transmitter-receiver - has contactless switch connecting dual purpose antenna

Info

Publication number
FR2254915A1
FR2254915A1 FR7441316A FR7441316A FR2254915A1 FR 2254915 A1 FR2254915 A1 FR 2254915A1 FR 7441316 A FR7441316 A FR 7441316A FR 7441316 A FR7441316 A FR 7441316A FR 2254915 A1 FR2254915 A1 FR 2254915A1
Authority
FR
France
Prior art keywords
receiver
radio transmitter
dual purpose
contactless switch
switch connecting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7441316A
Other languages
French (fr)
Other versions
FR2254915B3 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of FR2254915A1 publication Critical patent/FR2254915A1/en
Application granted granted Critical
Publication of FR2254915B3 publication Critical patent/FR2254915B3/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H04B1/48—Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter

Abstract

The antenna switch consists of a controllable impedance network between the antenna and the sender and receiver, which passes the signal frequency band, and of two electronic switches. The latter, when operated, make the above network non-conducting for the signal frequency band. The network consists of a T-section low pass filter, with an additional capacitor added to the shunt arm. The electronic switch is a PIN diode, and the capacitor a discrete capacitor. The resistances of the electronic switches in both passing and blocking conditions have a negligible influence. The apparent impedance network does not need to be tuned to a specific working frequency.
FR7441316A 1973-12-18 1974-12-16 Combined radio transmitter-receiver - has contactless switch connecting dual purpose antenna Granted FR2254915A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732362889 DE2362889A1 (en) 1973-12-18 1973-12-18 RADIO TRANSMITTER / RECEIVER

Publications (2)

Publication Number Publication Date
FR2254915A1 true FR2254915A1 (en) 1975-07-11
FR2254915B3 FR2254915B3 (en) 1977-09-16

Family

ID=5901127

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7441316A Granted FR2254915A1 (en) 1973-12-18 1974-12-16 Combined radio transmitter-receiver - has contactless switch connecting dual purpose antenna

Country Status (2)

Country Link
DE (1) DE2362889A1 (en)
FR (1) FR2254915A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2544503A1 (en) * 1983-04-15 1984-10-19 Snecma DEVICE FOR DECOUPLING THE TRANSMISSION AND RECEPTION CHANNELS IN A RADAR WITH A SINGLE ANTENNA
EP0151014A2 (en) * 1984-01-27 1985-08-07 Nec Corporation Radio transceiver including an antenna switching circuit
EP0767542A2 (en) * 1995-10-05 1997-04-09 Daimler-Benz Aktiengesellschaft Transmit-receive switch

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4055807A (en) * 1976-03-25 1977-10-25 Motorola, Inc. Antenna switch
DE3844541C2 (en) * 1987-09-30 1995-06-08 Fujitsu Ten Ltd Antenna circuit for a multiband antenna
US5258728A (en) * 1987-09-30 1993-11-02 Fujitsu Ten Limited Antenna circuit for a multi-band antenna
KR910005602A (en) * 1989-08-12 1991-03-30 강진구 RF transmission / reception circuit of mobile communication equipment
DK164336C (en) * 1990-02-19 1992-11-02 Karsten Gyde Pilested SECURITY SYSTEM FOR MONITORING EMNERS, e.g. GOODS, PASSAGE FOR CERTAIN ZONES
DE9115204U1 (en) * 1991-12-07 1992-05-27 Rr Elektronische Geraete Gmbh + Co Kg, 2300 Kiel, De
DE19638597A1 (en) * 1996-09-20 1998-03-26 Bosch Gmbh Robert Antenna arrangement
DE19948964C2 (en) * 1999-10-11 2001-10-04 Texas Instruments Deutschland Circuit arrangement for establishing a unidirectional connection between transmitting and / or receiving devices and an antenna

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2544503A1 (en) * 1983-04-15 1984-10-19 Snecma DEVICE FOR DECOUPLING THE TRANSMISSION AND RECEPTION CHANNELS IN A RADAR WITH A SINGLE ANTENNA
EP0122854A1 (en) * 1983-04-15 1984-10-24 Societe Nationale D'etude Et De Construction De Moteurs D'aviation, "S.N.E.C.M.A." Decoupling device for transmitting and receiving channels in a radar using a single aerial
EP0151014A2 (en) * 1984-01-27 1985-08-07 Nec Corporation Radio transceiver including an antenna switching circuit
EP0151014A3 (en) * 1984-01-27 1985-08-21 Nec Corporation Radio transceiver including an antenna switching circuit
EP0767542A2 (en) * 1995-10-05 1997-04-09 Daimler-Benz Aktiengesellschaft Transmit-receive switch
EP0767542A3 (en) * 1995-10-05 2001-04-18 DaimlerChrysler AG Transmit-receive switch

Also Published As

Publication number Publication date
FR2254915B3 (en) 1977-09-16
DE2362889A1 (en) 1975-06-19

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Legal Events

Date Code Title Description
ST Notification of lapse